Radio indicating device



l 0d, 30, 1928. y

c. A. scHAEFl-:R

RADIO INDICATING DEVICE Filed Nov. 16, 1925 Patented Oct. 30, 1928.

cnARENcE A. scHAnrnn, or DAVENPORT, IOWA.

RADIO INDICATING DEVICE.

Application filed November 16, 1925. Serial No. 69,483.

This invention relates to certain new and useful improvements in radioindicating devices, and has more particular reference to an improveddevice particularly adapted for facilitating tuning of radio receivingsets for reception of` concerts or the like from any desired one of anumber of broadcasting stations having broadcasting apparatus set fordifferent wave lengths.

The primary object of the invention is to provide an indicator of theabove kind which is extremely simple and durable in construction as wellas eicient in operation.

A further object is to provide an indicator of the above kind embodying`readily removable tags for designating the stations and their wavelengths and effective means. for removably retaining the tags in thedesired or necessary position, whereby the tags may be interchangeablyand temporarily applied to suit the various conditions of use and toenable making of changes when the wave length ofthe sending apparatus ofany particular station is changed.

A still further object of the invention is to provide means for enablingthe indicating tags to be made relatively small and at the same timefacilitate reading of the names of the stations and the wave lengths oftheir sending apparatus placed on such tags.

Other objects will appear as the nature of the invention is betterunderstood, and the same consists in the novel form, combination.

and arrangement of parts hereinafter more fully described, shown intheaccompanying drawing and claimed.

In the drawing, wherein like reference characters indicate correspondingparts throughout the several views,

Figure 1 is a front elevational view of a radio indicating device"constructed in accordance with the present invention.

Figure 2 is a vertical sectional view taken substantially upon line 2 2of Figure l.

Figure 3 is a fragmentary section taken substantially upon line 3--3 ofFigure 2.

Figure 4 is a fragmentary radial section drawn on a larger scale andtaken substantially upon line 4-4 of Figure 1 and Figure 5 is anenlarged perspective view of one of the station indicating tags.

In the form of the invention herein shown by way of example, there isprovided an indicator disc 5 adapted to be suitably secured upon theouter surface of the panel 6 forming vided with a plurality of spacedconcentric circular ribs 10 upon its .outer surface con-, centric withthe shaft 9 and provided with beadedfree edges as shown.

As is also shown, the outer one of these ribs is formed integral withthe plate by turning the edge of the plate upwardly and then forming theedge intoa bead.

A plurality of concentric. circular spaces is thus provided forreception of a plurality of segmental station indicating tags 11, two

of which are shown in place i1rFi-g1i1'e 1. It is thus apparent thattags representing a large number of stations may be placed between eachpair of adjacent ribs 1 0 sothat when the tags are disposed in two orvmore concentric circular rows, a large number of stations may beprovided for.

The tags 11 are similar in construction and include a flat plate-likebody portion having resilient laterally directed ends 12 which arecorrugated to engage the beads of the ribs 10 whereby the tags areeffectively detachably maintained in place. It is preferable that theresilient ends of the be disposed Vto pass between adjacent ribs toengage the ad` jacent sides of the beads thereof as shown.

By rounding the corrugations of the ends 12 of lthe tagsV 11, the lattermay be more readily removed and applied, and by tensioning the ends 12of the tags 11 to separate, the same may effectively engage the beadsofthe ribs for preventing accidental displacement of the tags underordinary conditions. Each tag is preferably provided, by printing,stamping or the like, with the name of a station as at 13 and with theparticular' wave length as at 14 of the broadcasting apparatus of suchstation. In addition to this each tag has a central outstanding rib 15which is disposed radial to the shaft 9 when the tag is in place andsupported by the disc 5.

A cap 16 is applied to and suitably retained upon the knob 8 and hasradial oppositely Cir projecting strips of magnifying glass 17 fixedthereto so as to provide a pair of indicating arms movable with the knob8 and shaft 9.

The arms 17 have central radial indicating lines 18 suitably placedthereon, and it is readily apparent that when the knob 8 is rotated to adesired position the line 18 of one arm 17 may coincide with the rib 15of one tag and the similar line 18 of the other arm 17 may coincide witha further tag positioned at the opposite side of the shaft 9. This istrue if tags are only associated with one annual space between the ribs10, but if tags are provided in both annular spaces, it is apparent thatthe indicating" lines of 18 of the arms 17 may simultaneously coincidewith the indicating ribs 15 of four tags. These tags will of course allbear the names of stations from which matter may be received when thearms are'so set. In other words, a'

plurality of stations may be provided with sending apparatus adjusted tothe same wave length7 and the disc is made for accommodating the namesof such plurality of stations in proper positions so that the desiredresult is had when the indicating lines 18 are alincd with theindicating ribs of the tags designating such stations. The indicatingarms 17 of magnifying glass are preferably of a width corresponding tothe general width of the tags so that when an arm is properly set withrespect to a tag, the data on such tag is magnified and readilyreadable. It is thus apparent that the invention provides means forfacilitating tuning of a radio receiving set to receive from any desiredone of a number of stations.

The cap 16 is preferably provided with pairs of clips 19 for retainingreception of the ends of the arms 17 so that the latter are positionedfor properly swinging across the surfaces of the tags parallel with theplane of the disc 5.

While I have herein shown by way of eX- ample a stationary disc andmovable indicating arms, it is nevertheless apparent that the form andrelation of these parts may be greatly varied without departing from thespirit and scope of the invention as claimed, it being merely essentialthat one of these elements be movable relative to the other` From theforegoing description it is believed that the construction and operationas well as the advantages of the present invention will be readilyunderstood and ap preciated by those skilled in the art.

What I claim is new is:

1. A wave indicator for radio receiving sets, comprising a disc memberhaving a central aperture for the extension therethrough of aninstrument shaft, a plurality of spaced concentrically arranged ribsprojecting from the outer face of said disc, each of said ribs havingthe forward edge thereof formed to set up a bead, station indicator tagseach comprising a plate like portion having a laterally extendingcorrugated leg at each end designed to be sprung between a pair of saidribs to engage the beads thereof, and a. pointer member adapted to befixed to said shaft for rotation therewith for co-action with said tagsto tune the set for the reception of a desired station.

2. A Wave indicator for radio receiving sets, comprising a disc memberhaving a central aperture for the extension therethrough of aninstrument shaft, a plurality of spaced concentrically arranged ribsproject-ing from the outer face of said disc, each of said ribs havingthe forward edge thereof formed to set up a bead, station indicator tagseach comprising` a plate like portion having a laterally extendingcorrugated leg at each end designed to be sprung between a pair of saidribs to engage the beads thereof, a pointer member adapted to be fixedto said shaft for rotation therewith for co-action with said tag to tunethe set for the reception of a de `sired station, and a rib formed uponthe outer face of the plate like portion of each tag to extend radiallyof the face of said disc, each of said ribs indicating the setting pointfor the indicator for the reception of the station indicated upon thertag.

3. A dial pointer of the character described, comprising a cap likemember designed to engage over a rotatable instrument control knob, anelongated glass having a longitudin ally extending indicator linethereon, and means carried by said cap at the periphery thereof forengaging one end of said glass to hold the same in a radially extendingposi tion with respectto said knob, to Vpermitthe` CLARENCE A.SGIIAEFER.

